Engineering work is taking place between Hackney Downs and Cheshunt, closing all lines via Tottenham Hale overnight from Monday evening until Wednesday morning.
Between 23:20 (Monday and Tuesday) and 05:00 (Tuesday and Wednesday), trains that usually run via Tottenham Hale will be retimed, and will be diverted to run via Seven Sisters instead.
Stations on the Tottenham Hale line are only a short distance from those on the Seven Sisters line. You can view maps that show routes between these stations on the Greater Anglia website.
Check before you travel:
You can plan your journey using the National Rail Journey Planner.